Automatic time-switch.



AUTOMATIC TIME SWITCH.

`l`APPLICATION FILED MAY 24, |915.

Pawntd sept. 24,1918.

2 SHEETS-SHEET I.

v Y v ]2 O m W6 v /I H/I/EY rens ca. mmmvumu. wasnmmvn, n c4 MI.H.AVRAM. Automne TIME swlTCH. APPLICATIQN FILED MAY 24. l9l5.

2 SHEETS-SHEET 2.

@gun-mn.'

' Patented Sept. 24, 1918.

UNITED STATES inrENr OFFICE.

Mo's'. wanner New yomQN. Y., AssIeNon .rorsriooiiig .Avanti-fai sLocrm,IN'., or NEW YORK, N. Y., A1 CORPORATION orNEW rolt-K.'4

AUTOMATIC TIME-sW/Irci.

specification of Letters'raient.,` Tattdsijfl 4 Applicationmed-Maya@1,915.- -seiarNaegasig To all 'whom' t mag/concern? Beitxknown 'that I,Mo'r's H. AVRAM, ah

citizen ofthe United States, andau'esidentv of New Yorkcity, county,and'Stater of New 'Yorlg have invented cert-ain new andfusefulImprovements in Automatic Time-Switches,

of which the following-is a specification.y h

This invention yrelates to an automatic time switchI of novelconstruction which is vmore y'particularly designed yto ber used inconjunction with an eiiiciency recorder for 1nachnes,-etc., such asforinstance shown n `length of time asin this way only, a properenergizing' kof Athe electromagnets that form part of Ithe eHiciencyrecorder, may he relied upon; The invention further comprises other'novel features of construction more fully brought out-inthe appendedspecification and claims.

In the accompanying drawing, Figure 1 is a face view ofmy improvedtimesvvitch and cooperating parts;

`Fig. 2 a side view of Fig. 1; Fig. 3 an enlarged view partly insection* ofthe time switch with the cover removed; y Fig. 47a crosssection on line l1-1, Fig. 3; .Figo ya similar section on line 5-5, Fig.3, 'and n Fig-6 -a detail; ofthe feed pawl-controllmg cam.

The casing .of myy improved-time switch comprisesa 'basefplate 10 and acover 11 dust-tightly secured to saidzplate 'by means ofscrews 12.Intoaperforationof a Vdepressed portion 13 ofplate 10 is firmly drivenabolt 14 upon which isgfree to rotate a sleevef'l thelower flange lfofwhich 1s accommodated within a corresponding recess .17 of'basegplate10. Sleeve 15 isheld to bolt!v 14 by p means of an adjustable feedpaWl-controlling; cam plater 18 hereinafter more fully'referredto,saidcambeing secured toplate 10 by means of a screw 19 and engaging flange16. Sleeve 15 is-` accommof dated lwithin -va corresponding bore 20 ofcover 11 and passes-through a vdust-proof stuiing box 21. Upon theprotruding angularportion 22 of sleeve 15 is fitted the hub 23 `ofalever 24: provided :with a longitudinal` slot .25'. To `lever 24 is adjustahly 'fclamped `j a block 26 into a perforation 1 of which isfoscillatably ftted abolt 27. TheI head'282 kof tlieflatter r isprovidedfwith a' transverse='bo1e' adapted for 'the `reception l"of aibipartite 'rei cip'rocal'rod 29wliich is,.fby clamp"30,-con' nected :tosuitable xoscilla'tive :part414 of "the machine to' he controlled.r `Inforder" to" prei vent a breakage `of .the .p'artsdescribedin ycasetheya-refnot properlyla'dj usted, afyiellding. `connection is providedbetween' Vtl-ref clamp 30,l and ileverV 24, which isv showntto tween the.head 28' and :abutrnents .'32 rodea Y p Y The@ Hange f16 aradiallyextending arm 33 tofwhichis 'pivconsist ofapair of springs31?interposede-bev of sleevel5J'is providedfvvithl oted a pawl3L1finfluencedhy a :spring 'that isyattached tUsaidarm. :Spring-35 holdsthe y pa-wl ,34C f in leng'fagement lvwith ratchet wheel 36looselylmounted on sleevezlpa springiniiuenced detent 37 preventing?undesired backward rotation' ofthe ratc'het wheel 3G. To thelatterisjkeyed orfothelf wise secured a camwlieel 38 showntofloe pioivided with va pair of diametrically :opposed yteeth 39 although it isob-i'fio'us thatxitimay'fbe' provided withfa different numberofrsuch"teeth as conditions may;v require.

, y 85 Each of the teeth 39 is'. adapted: to engage the ylaterallyprotruding: arm f or 4nose of ay plunger .41havingfa stem 42 that. isjslid'- ably supported by a suitable bearingT/JStof` base-p.late*10`.\VIPlu-iigenil is furthermore provided with :a head *orf .piston-44 thatslid; f ably engagesa cylinder 45 secured to :.th'e." baseplate 10.Intermediateplunger141 and vancingfthe teeth 39 of cam-wheelmizthe"direction of-"thearr`ow (Fig.- 3).` Inthisf way, the'y tooth 3 9engaging vnose .40"wi1l" gradually retract ythe plunger 11andipist/0n141 against the actiongof ,spring'l16, untilthe parts have arrived .inthenpositionfillustrted in 'FigaB, the tooth "39f beingz aboutttoeclearnose .40. As Vsoon-as .the tooth-39. has'n'efj leased'the nose 40, thespring-:46#will'fadvance theplunger 4:1 toWardits initialfpo-y sitionwhich advance movement-isfhowever retarded owingpto the resistanceoffered by block isin turn secured to base plate 10.`

Contact spring 47 is adapted to be engaged by one arm 50 of a bell cranklever 51 pivoted at52 to plunger 41. The, other arm 53 of this lever isinfluenced by a spring 54, the play of arm 5.3 being limited by a stop55 provided on plunger 41. It will be seen that during the advancemovement of this plunger which takes place upon the disengagementbetween one of the teeth 39 and nose 40, arm 50 will bend the spring 47into contact with the spring 48, which contact will be maintained untilthe lever-arm 53 engages a fixed stop 56 of base plate 10. Owing to thisengagement, the lever 51 will be tilted during the continued advance ofplunger 41 so that the arm 50 will slip orf spring 47 and thereby permitthe springs 47, 48 to become separated thus again occupying the positionillustrated in Fig. 3. s the advance'movement of plunger 41 isconsiderably retarded owing to the provision of. piston 44 and cylinder45 it is obvious that the contact established' between the springs 47 48will be maintained for the desired length of time for reliably closingthe circuit (not shown) controlled by said Contact springs. L During thesubsequent return movement of plunger 41, thek lever arm 50 will glideby spring 47, a taking along of said spring being prevented by a Xed sto5 llt) will be seen that by properly setting block 26 the angular playimparted to lever 24Amay be regulated, said langular playin turndetermining the angular play of pawl 34 and consequently the number ofteeth of ratchet wheel 36 to be engaged during each oscillation of saidpawl. To still further control the intermittent advance movementoffratchet wheel 36, the hereinabove mentioned plate 18 is provided witha cam portion 58 adapted, to be engaged by pawl '34;

It'will be seen that as soonas this pawl enga gesthe cam 58, it will belifted out of engagement with ratchet wheel 36. By loosening the screw19 that passes through al segmental slot 59 of plate 18, the cam 58 maybe advanced towardv or retracted from the pawl 34 thereby eitherincreasing or diminishing the number of ratchet teeth adapted to beengaged by said pawl.

I have shown but do notherein claim mechanism to count or record thenumber of operations of ratchet wheel 36, comprising a toothed wheel 60lirmly attached to the ratchetJ wheel 36, the number of teeth of saidwheel corresponding to the number of teeth on the ratchet wheel. Thetoothed wheel 60 is engaged by a pinion 61 having ten teeth and securedto the spindle 62 of a counter 63 of convenient construction, theuppermost numbers or said counter being exposed through a window 64provided in coverll. The squared end 65 or spindle 62 passes outwardlythrough a suitable dusttight stuiiing box 66', so that it may be engagedby a key for setting the counter to zero. f

Spindle 62 is further provided with a worin A67v engaging a worm wheel68, that is shown. to be furnished with a plurality of sockets 69. Thelatter are designed for the receptionr of one or more contact pins '70adapted to engage a stationary contact 71.v By each engagement between acontact pin 70 and the stationary contact 71, a signaling circuit (notshown) lis closed by means of which the completion of a suitable numberof operations, etc., of the machine to-be controlled, may be perceivablyannounced.

It will be seen that by my novelautomatic time switch theelectroma'gnets of the eiliciency recorder Vwith which said switchcooperates, may be reliably actuated.

1. In a device of the character described, an oscillatable memberadapted lto be actuated by the machine to be controlled, aspring-iniuenced plunger, means whereby said plunger is adapted to beoperated intermittently by said member in opposition to its spring, apair of contacts adapted to be closed by and during the advance movementof the plunger under they influence of its spring, means for retardingsaid advance movement of the plunger and means controlled by saidplunger but independently actuated for breaking said contact near theend of the advance movement thereof.

2. In a device of the character described, an oscillatable memberV`adapted to be actuated by themachineto be controlled, a.spring-inliueneedY plunger, means whereby saidplunger is adapted to beAoperated-intermittently by said member in opposition to its spr-ing, apiston carried by Vthe plunger, a stationary cylinder adapted to beengaged by said piston, said piston and cylinder jointlyconstitutingmeans for retarding the advance movement ofl thel plungei1under the'intluence oi." its spring,"

3. In a device of the character described, an oscillatable memberadapted to be actuated by the machine to be controlled, aspring-iniuenced plunger, means whereby said plunger is adapted to beoperated intermittently by said member in opposition to its spring, aspringsinfluenced lever fulcrumed to said plunger, a pair of contactsadapted to be closed by said lever during the advance movement of theplunger under the inliuence of its spring, means for retarding saidadvance movement of the plunger and means for rocking said ylever nearthe end of the advance movement of said plunger for breaking saidcontacts.

Ll. In a device of the character described, an oscillatable memberadapted to be actuated by the machine to be controlled, aspring-influenced plunger, means whereby .said plunger is adapted to beoperated intermittently by said member in opposition to its spring, aspring-influenced lever fulcrumed to said plungera pair of contactsadapted to be consecutively closed and opened by said lever during theadvance movement of the plunger under the influence of its spring, andmeans for retarding said advance movement of the plunger, said leverbeing automatically rocked to open said contacts near the end of theadvance movement of said plunger.

5. In the device of the character described, an oscillatable memberadapted to be actuated the machine to be controlled, a spring-influencedplunger, means whereby said plunger is adapted to be operatedintermittently by said member in opposition to its spring, a bell cranklever fulcrumed to the plunger, a stop on the plunger adapted to beengaged by the irst arm of said bell crank lever, a spring for normallyholding said lirst arm in engagement With said stop, an additional ixedstop adapted to be engaged by said first arm, and a pair of contactsadapted to be closed by the second arm of said bell crank lever duringthe advance of said plunger under the influence of its spring, saidlever being automatically rocked to open said contacts near the end ofthe advance movement of said plunger.

6. In a device of the character described,

` an oscillatable member adapted to be actun luence of its spring, meansfor retarding said advance movement of the plunger, means carried bysaid plunger for positively closing said contacts and independent meanscoperating therewith for breaking said contacts near the end of theadvance movement of said plunger.

7. In a device of the character described, an oscillatable memberadapted to be actuated by the machine to be controlled, a pawl adaptedto be actuated by said member, a ratchet Wheel adapted to be actuated bysaid member, a ratchet Wheel adapted to be actuated by said paWl,adjustable means for varying the number of teeth of the ratchet Wheel tobe engaged by the pawl, a cam secured to said ratchet Wheel, aspring-im.

fluenced plunger adapted to be actuated by said cam, in opposition toits spring, a pair of contacts adapted to be `closed during the advancemovement of the plunger under the iniiuence of its spring, means forretarding said advance movement of the plunger, means carried by saidplunger for positively closing said contacts and independent meanscooperating therewith for breaking said contactsnear the end of theadvance movement of said plunger.

MOIS H. yAVRAM.

Copies of thin patent may be obtained for ve cent: each, by addressingthe "commissioner of Patents,

Washington, D. G.k

